Field-circuit coupled analysis for a new type high speed pm machine

In this paper,the structure design and the electromagnetic properties analysis of a 60 000r/min,100 kW PM machine are engaged.A new type of rotor,which is made of an integral PM enclosed in a nonmagnetic high strength alloy,is introduced.And a new type stator which could not only reduce the electromagnetic loss on the rotor surface but also could cool the machine more efficiently is brought forward.Then the electromagnetic properties of the machine under load and no load operation are investigated using the field-circuit method.